Changing AVG card payment details

Hello Rupert, 
Thank you for contacting AVG Community Support.
We are sorry to know that you are unable to update the card details. We'll certainly check and help you out.
To update the payment card details for an AVG subscription via your AVG Account, refer to the following article:
Managing subscriptions via your AVG Account ▸ Change my payment card details (https://support.avg.com/SupportArticleView?l=en&urlName=AVG-Account-subscription)
If you are facing any issues, please reach our AVG billing & sales team using this link: https://support.avg.com/avg/en/ww/home/current/contact and they will check and help you with this.
After clicking the above link, select Account and Billing -> Purchase and Renewal help -> Get Support -> Voice call or Chat.
Thank you and keep us updated.

Hello Rupert, 
Thank you for contacting AVG Community Support.
We are sorry to know that you are unable to update the card details. We'll certainly check and help you out.
To update the payment card details for an AVG subscription via your AVG Account, refer to the following article:
Managing subscriptions via your AVG Account ▸ Change my payment card details (https://support.avg.com/SupportArticleView?l=en&urlName=AVG-Account-subscription)
If you are facing any issues, please reach our AVG billing & sales team using this link: https://support.avg.com/avg/en/ww/home/current/contact and they will check and help you with this.
After clicking the above link, select Account and Billing -> Purchase and Renewal help -> Get Support -> Voice call or Chat.
Thank you and keep us updated.

AVG tell me they can't process my next payment because my card has expired, however when I log in I am unable to access the bank details to change them, so I am stuck